i've long since ran out of open plugs on my TV, and am looking to add another system... so i guess i need a system selector.

just need the cheapest (decent quality) option to handle 4+ systems.

saw one at target.com for 20, any way to get it cheaper than that? prefer stores that have b&m outlets around here, so i dont have to pay shipping :)

Am I correct in assuming that you need both S-Video and composite video inputs/outputs?

Here are some options for online ordering:

http://www.overstock.com/cgi-bin/d2.cgi?PAGE=PROFRAME&PROD_ID=663613
http://www.amazon.com/exec/obidos/tg/detail/-/B000246UMQ
http://www.amazon.com/exec/obidos/tg/detail/-/B00005NCWK

I'd recommend the last one, from Sima, as they are more a more well-known company than the others. If you choose that one, be sure to order it from Amazon for $25.64 to get free shipping (see the "More Buying Choices" menu on the right).

You should be able to find these at any local Target/WalMart/Best Buy/Circuit City pretty easily, probably in the same $25-30 price range.

There is also this model:

http://www.amazon.com/exec/obidos/tg/detail/-/B00000J4BC

More money, but it will respond to the remote controls of your devices, so you don't have to actually push a button on the unit to switch sources. Handles up to 6 components as well.